Samsung Galaxy S21 5G vs Realme 10 - Detailed Phone Comparison

Detailed Comparison

Specification
Realme 10
Realme 10
Realme

General

Launch Date January 29, 2021 November 11, 2022
Release Year 2021 2022

Physical

Volume 85.33 cm³ 93.77 cm³
Screen Size to Weight Ratio 3.67 "/g 3.6 "/g
Weight 169 g 178 g
Height 151.7 mm 159.9 mm
Width 71.2 mm 73.3 mm
Thickness 7.9 mm 8 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Blue
  • White

Display

Screen Size 6.2 " 6.4 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 85.9 % 84.4 %
Pixel Density 421 PPI 411 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1300 nits 1000 nits

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 122.07 mAh/in²
Battery Density 46.88 mAh/cm³ 53.32 mAh/cm³
Battery Capacity 4000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Helio G99 (6 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU Mali-G78 MP14 - International Mali-G57 MC2

Connectivity

USB Version 3.2 2.0
OTG Support 1 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 3.2, OTG USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 11 12
Maximum OS Version 15

Comparison Summary

Smartphone Comparison: Samsung Galaxy S21 5G vs. Realme 10

1. Specifications Comparison

Here's a detailed comparison of the key specifications for the Samsung Galaxy S21 5G and the Realme 10, focusing on their practical implications:

Design & Build

FeatureSamsung Galaxy S21 5GRealme 10Practical Impact
Dimensions151.7 x 71.2 x 7.9 mm159.9 x 73.3 x 8 mmRealme 10 is taller and wider, might feel slightly less comfortable in hand for some users.
Weight169g178gSamsung Galaxy S21 5G is lighter, which can be noticeable during prolonged use, enhancing portability.
Build MaterialNot SpecifiedNot SpecifiedUnknown impact, need more information
Screen ProtectionCorning Gorilla Glass VictusCorning Gorilla Glass 5Samsung Galaxy S21 5G offers significantly better screen protection, increasing durability.

Display

FeatureSamsung Galaxy S21 5GRealme 10Practical Impact
Size6.2"6.4"Realme 10 offers a slightly larger viewing area, better for media consumption.
Resolution1080 x 24001080 x 2400Both have sharp displays, images will be equally clear and detailed.
Pixel Density421 PPI411 PPIBoth offer similar sharpness, differences won't be noticeable to the naked eye.
TechnologyAMOLEDAMOLEDBoth offer vibrant colors, deep blacks, and excellent contrast.
Refresh Rate120Hz90HzSamsung Galaxy S21 5G provides smoother scrolling and animations, more responsive UI experience.
Brightness1300 nits1000 nitsSamsung Galaxy S21 5G is much more visible outdoors in bright sunlight.

Performance

FeatureSamsung Galaxy S21 5GRealme 10Practical Impact
ChipsetExynos 2100 (5 nm)Mediatek Helio G99 (6 nm)Samsung Galaxy S21 5G offers superior processing power, better for demanding tasks, multitasking, and gaming.
Antutu Score749,100401,886Samsung Galaxy S21 5G delivers a significantly faster user experience, less lag and quicker loading times.
GPUMali-G78 MP14Mali-G57 MC2Samsung Galaxy S21 5G is equipped with a much more capable GPU, offering better gaming performance and smoother graphics rendering.
RAM8GB4GB or 8GBSamsung S21 5G will have better multitasking performance due to higher base RAM. If Realme 10 is 4 GB it will perform worse than S21, if 8 GB it will perform equally.

Camera

FeatureSamsung Galaxy S21 5GRealme 10Practical Impact
Main Camera12MP, f/1.8, 1/1.76", 1.8µm pixel50MP, f/1.8, 1/2.76", 0.64µm pixelRealme 10 has a higher resolution, but the S21 5G has larger sensor, larger pixels, potentially better low-light performance, and potentially more natural images
Telephoto64MP, f/2.0, 1/1.72", 0.8µm pixelNot availableSamsung Galaxy S21 5G has telephoto for optical zoom, better for zoomed photos.
Ultrawide12.2MP, f/2.2, 1/2.55", 1.4µm pixelNot availableSamsung Galaxy S21 5G provides ultra-wide perspectives, great for landscape and group shots
Selfie Camera10MP, f/2.2, 1/3.2", 1.22µm pixel16MP, f/2.45, 1/3.06", 1.00µm pixelRealme 10 has higher resolution, but the S21 5G has a wider aperture and larger pixels, potentially better low-light selfies.
Black & white CameraNot Available2MP, f/2.4, 1/5", 1.75µm pixelRealme 10 offers dedicated Black & white photos.
Video RecordingUp to 8K@24fps, 4K@60fps, HDR, EIS, Stereo sound1080p@30fpsSamsung Galaxy S21 5G offers superior video quality, more detailed footage, smoother stabilization, and cinematic options.
Camera Features4K/8K Video, Optical zoom, OIS, RAW, Night ModeDigital zoom, Dual cameraSamsung Galaxy S21 5G offers more versatile features for photography, including optical zoom and optical image stabilization.
DxOMark ScoreMobile: 111, Selfie: 132Not availableSamsung Galaxy S21 5G is confirmed to be the better camera due to DxO scores.

Battery

FeatureSamsung Galaxy S21 5GRealme 10Practical Impact
Capacity4000 mAh5000 mAhRealme 10 is likely to provide longer battery life due to its larger capacity.
Charging25W Fast Charging33W Fast ChargingRealme 10 offers slightly faster charging.
FeaturesWireless charging, Reverse chargingNoneSamsung Galaxy S21 5G offers convenient wireless and reverse charging capabilities.

Other Features | Feature | Samsung Galaxy S21 5G | Realme 10 | Practical Impact | |-------------------|-------------------------|-------------------|----------------------------------------------------------------------------------------------------------------------------------------------------| | WiFi | Wi-Fi 6 | Wi-Fi 5 | Samsung Galaxy S21 5G is better for high-bandwidth use cases like streaming and gaming, better connection in crowded networks. | | Bluetooth | 5.0 | 5.3 | Realme 10 has more energy efficient connection | | Software | Android 11 to 15 | Android 12 | Samsung Galaxy S21 5G has more updates available |

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • Significantly Superior Performance: The Exynos 2100 chipset and Mali-G78 MP14 GPU provide much faster processing speeds and better gaming capabilities.
  • Higher Quality Display: 120Hz refresh rate, much higher brightness (1300 nits), and slightly higher PPI make it a smoother and clearer display, especially outdoors.
  • Advanced Camera System: Telephoto, ultrawide cameras, optical zoom, OIS, and superior video recording capabilities, along with high DxOMark scores, offer versatile options for photography enthusiasts.
  • Premium Features: Includes wireless charging, reverse wireless charging, a better fingerprint sensor, and a wider range of connectivity options.
  • Better Build Quality: Includes more robust screen protection with Corning Gorilla Glass Victus.

Realme 10 Advantages:

  • Larger Battery: The 5000 mAh battery offers better battery life, especially for users who prioritize endurance.
  • Faster Charging: 33W charging is faster than the 25W on the S21 5G.
  • Newer Bluetooth: 5.3 has lower energy consumption.
  • Newer Android version: Starts with Android 12 which is 1 version higher than the Samsung Galaxy S21 5G.
  • Lower price: Generally will be the budget-friendly option.

Trade-offs:

  • The Samsung Galaxy S21 5G sacrifices battery capacity and charging speed for significantly better performance, display quality, and camera features.
  • The Realme 10 offers a longer battery life and is newer, but lags in performance, display quality, camera features and build quality when compared to S21 5G.

3. User Profiles & Recommendations

Ideal User for Samsung Galaxy S21 5G:

  • Power Users: Those who need top-tier performance for gaming, video editing, or intensive multitasking.
  • Photography Enthusiasts: Users who prioritize camera versatility, advanced features like optical zoom, and high-quality photos and videos.
  • Users Who Value Premium Display: People who want the smoothest, clearest viewing experience, especially in bright conditions.
  • Users Who Value Wireless Charging: Users that need to charge their device on-the-go without cables.

Use Cases for Samsung Galaxy S21 5G:

  • Mobile gaming with high frame rates and smooth graphics
  • Professional-quality photo and video capture for social media or projects
  • Bright outdoor use for reading, navigation, or content consumption
  • Wireless charging capability for added convenience

Ideal User for Realme 10:

  • Budget-Conscious Users: Those looking for a solid phone with good battery life without paying a premium.
  • Users Prioritizing Battery Life: People who need a phone that can last through a long day without frequent charging.
  • Casual Users: Individuals who primarily use their phone for basic tasks like browsing, social media, and calls.

Use Cases for Realme 10:

  • Daily usage with long battery life
  • Social media browsing and content consumption
  • Reliable performance for standard apps
  • Users that value a newer device

4. Decision Framework

Key Questions for Buyers:

  1. How important is raw performance? If gaming, demanding apps, or heavy multitasking are crucial, the S21 5G is the clear winner.
  2. What is your priority: camera or battery? If camera quality is essential, the S21 5G is superior. If long battery life is most important, choose the Realme 10.
  3. What is the price-to-performance ratio? If you want a phone with better specs for the price, the S21 5G will likely be more expensive, but worth it if you value premium performance, screen, build and camera. The Realme 10 is usually cheaper, but compromises on performance and the overall quality of the device.

Scenario-Based Recommendations:

  • For Mobile Gamers/Power Users: Choose the Samsung Galaxy S21 5G for its significantly better performance, graphics, and display.
  • For Photography/Video Enthusiasts: The Samsung Galaxy S21 5G offers greater versatility, better quality and advanced features.
  • For Budget-Conscious Users Seeking Long Battery Life: The Realme 10 provides reliable performance for everyday use and its battery will last significantly longer than the S21 5G.
  • For Everyday Users: The choice depends on needs, if the user wants the device to last longer, Realme 10, if the user values the camera, screen and power, go for the Samsung Galaxy S21 5G.

What Would I Choose and Why?

If I were to choose between these two phones, I would pick the Samsung Galaxy S21 5G. While the Realme 10 has a larger battery and is newer, the S21 5G's overall superior performance, much better display, and more versatile camera system align more with what I need in a smartphone.

As someone who uses their phone for a variety of tasks, including gaming, photography, and media consumption, the significantly better chipset and graphics processor of the S21 5G would offer a smoother, more responsive experience. The higher refresh rate and brightness of the S21 5G would provide a much better viewing experience and the more advanced camera system is crucial for capturing memories and experimenting with different styles.

While battery life is an important factor, I value a premium display and overall performance more, and am willing to charge the phone more frequently to have a better user experience. Additionally, wireless charging and reverse wireless charging are very convenient features that are not offered on the Realme 10, further tipping the scales in favor of the S21 5G.

Emily Harper
Emily Harper

Technology Insights Specialist

Dedicated technology writer specializing in mobile device analysis and technology communication. Expert at translating complex smartphone features into clear, actionable insights for diverse audiences.

Key Strengths:

  • Mobile technology analysis
  • Digital media communication
  • Technical storytelling
  • User-centric technology insights

Bridging technical complexity with engaging, accessible narratives.